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Occupational Safety and Health Administration OSHA

Accident Report Detail

Accident: 201630563 - Two Employees Injured In Chlorine Gas Leak

Accident: 201630563 -- Report ID: 1054191 -- Event Date: 01/13/1999
InspectionOpen DateSICEstablishment Name
30251755201/14/19992621Boise Cascade Corp
Prior to the accident, "A" Bleach Plant was down and awaiting inventory. Chlorine gas bypassed a block valve and was released from the "A" take-up chest. A chlorine alarm sounded and Zone 5 was evacuated and subsequently a mill-wide evacuation occurred. This resulted in employees working on paper machines H1 and H2 being exposed to chlorine during emergency shut-down operations. The mill-wide evacuation resulted in a loss of negative pressure on the non-condensable gas or NCG system. This allowed NCGs to vent at the lime kiln vent valve for approximately 48 minutes. Two employees from the Shipping Department who returned following the evacuation were exposed to these NCGs. A second Zone 5 evacuation was again conducted.
Keywords: venting, chlorine, poisoning, accidental discharge, evacuation
Employee # Inspection Age Sex Degree Nature Occupation
1 302517552 Non Hospitalized injury Other Traffic, shipping and receiving clerks
2 302517552 Non Hospitalized injury Other Miscellaneous machine operators, n.e.c.

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